Mesa (master): i965/fs: Optimize saturating SEL.L(E) with imm val >= 1.0.
Matt Turner
mattst88 at kemper.freedesktop.org
Fri Nov 1 22:21:01 UTC 2013
Module: Mesa
Branch: master
Commit: ca675b73d3ac2e1b57ec385c2c80b05b6382f6b6
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=ca675b73d3ac2e1b57ec385c2c80b05b6382f6b6
Author: Matt Turner <mattst88 at gmail.com>
Date: Sun Oct 27 20:03:48 2013 -0700
i965/fs: Optimize saturating SEL.L(E) with imm val >= 1.0.
total instructions in shared programs: 1409124 -> 1406971 (-0.15%)
instructions in affected programs: 158376 -> 156223 (-1.36%)
Reviewed-by: Eric Anholt <eric at anholt.net>
Reviewed-by: Paul Berry <stereotype441 at gmail.com>
---
src/mesa/drivers/dri/i965/brw_fs.cpp | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 2350cd0..56284d9 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1880,6 +1880,28 @@ fs_visitor::opt_algebraic()
break;
}
break;
+ case BRW_OPCODE_SEL:
+ if (inst->saturate && inst->src[1].file == IMM) {
+ switch (inst->conditional_mod) {
+ case BRW_CONDITIONAL_LE:
+ case BRW_CONDITIONAL_L:
+ switch (inst->src[1].type) {
+ case BRW_REGISTER_TYPE_F:
+ if (inst->src[1].imm.f >= 1.0f) {
+ inst->opcode = BRW_OPCODE_MOV;
+ inst->src[1] = reg_undef;
+ progress = true;
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ break;
default:
break;
}
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